Add tracing for resolved endpoint (#784)

* Add tracing for resolved endpoint * update changelog
smithy-lang · Oct 20, 2021 · 8f623f6 · 8f623f6
1 parent 64a9d92
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diff --git a/aws/SDK_CHANGELOG.md b/aws/SDK_CHANGELOG.md
@@ -4,6 +4,7 @@ vNext (Month Day, Year)
 **New this week**
 
 - Moved the contents of `aws-auth` into the `aws-http` runtime crate (smithy-rs#783)
+- Add tracing output for resolved AWS endpoint (smithy-rs#784)
 
 v0.0.21-alpha (October 15th, 2021)
 ==================================

diff --git a/aws/rust-runtime/aws-endpoint/Cargo.toml b/aws/rust-runtime/aws-endpoint/Cargo.toml
@@ -12,3 +12,4 @@ smithy-http = { path = "../../../rust-runtime/smithy-http"}
 aws-types = { path = "../aws-types" }
 http = "0.2.3"
 regex = { version = "1", default-features = false, features = ["std"]}
+tracing = "0.1"
diff --git a/aws/rust-runtime/aws-endpoint/src/lib.rs b/aws/rust-runtime/aws-endpoint/src/lib.rs
@@ -28,7 +28,7 @@ use std::sync::Arc;
 /// - The URI of the endpoint (needed to actually send the request)
 /// - The name of the service (needed downstream for signing)
 /// - The signing region (which may differ from the actual region)
-#[derive(Clone)]
+#[derive(Clone, Debug)]
 pub struct AwsEndpoint {
     endpoint: Endpoint,
     credential_scope: CredentialScope,
@@ -186,6 +186,7 @@ impl MapRequest for AwsEndpointStage {
             let endpoint = provider
                 .resolve_endpoint(region)
                 .map_err(AwsEndpointStageError::EndpointResolutionError)?;
+            tracing::debug!(endpoint = ?endpoint, base_region = ?region, "resolved endpoint");
             let signing_region = endpoint
                 .credential_scope
                 .region